Hi Alec. Thank you so much for your help. The cartridge that is on the turntable now is a ATN 70L.
I have the original amplifier that came with the turntable. Actually my dad had the amplifier, the equalizer, the speakers, radio and the cassette player. Everything works fine so I hope once I replace the cartridge, the turntable is going to work as well.
Thanks again. Daniela.